Actually its using the rather generous NEDC - New European Driving Cycle.The article is published online by a United Kingdom magazine/website aimed at Europe.And if you do a rough calculation the 340 miles equates to about 245 miles on the USA EPA testing parameters - right in the Chevy Bolt ballpark.And we should probably note that the author states its a "prediction" not that any info or statements have been forthcoming from Nissan etc.

Battery capacity increases by 30 % from 30 to about 39 kWh.Not surprising, considering that if we look at the new Eaton Nissan xStorage battery capacity, the math points to 38,4 kWh. However, Nissan has always reported the total battery capacity, but I’ve been told that from now on, only the usable battery capacity would be advertised – the same way Renault does with its electric cars. If this proves to be true, it would mean that the 38,4 kWh would be usable capacity...

Nissan didn’t reach a deal with LG Chem and keeps the AESC battery cell production going for now.The new Nissan Leaf made in Japan will get its batteries from Smyrna, Tennessee in the USA...

Nice Find! More power and stronger re-gen will check a couple of boxes on my wish list. Nissan is going to take some grief if they only launch with a 40kWh battery but the price is really the key - they just have to keep the price away from the Bolt. How much lower is the question... But a 150 mile car would certainly work for me.

It will be interesting if the new Leaf launches with a less than 60 kWh battery. Many other reputable EV sites are reporting that 60 kWh is confirmed. However, it wouldn't surprise me if a more Zoe sized battery is correct. That would put Nissan at the front of the pack of affordable mid-range EVs and thus not competing directly with the Bolt or Model 3 while severely undercutting both in price. This could be a really smart move. The Tesla fanbois will of course declare it a huge mistake, but at the end of the day, sales are what matter. And, I suspect that a new 41 kWh Leaf with a sub-$30K starting price before incentives will sell well.